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3 years ago

What happens when elements are chemically combined?

2 answers:

6 0

Atoms of different elements can join together in chemical reactions to form compounds. For example hydrogen and oxygen are elements. They react together to form water, a compound

Hope that helps you!

antiseptic1488 [7]3 years ago

4 0

Depends on the elements... Certain type of chemicals combined can be very dangerous and have a big impact like blowing up, or fizzing.... But typically they form a new element. Some elements counteract other elements.

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How do countries with different currencies trade goods with each other?

8090 [49]

Answer:

D- They use the exchange rate to convert one's Country's currency to another's

Explanation:

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2 years ago

Does temperature stay the same when heat energy increases?

son4ous [18]

Answer:

More energy is required to raise its temperature. Therefore, temperature does not stay the same when heat energy increases.

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3 years ago

Read 2 more answers

Calculate the average atomic mass of element X using the table below. Then use the periodic table to identify the element. Separ

Ksenya-84 [330]

Answer:

126.8, Iodine

Explanation:

mass ×abundance/100
(126.9045×80.45/100)+(126.0015×17.23/100)+(128.2230×2.23/100)
102.1+21.7+3=126.8

IODINE has an atomic mass of 126.8 or 126.9

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2 years ago

The chemical equation of magnesium and nitric acid

marshall27 [118]

Mg + 2H(NO)3 ⇒ Mg(NO3)2 + H2

5 0

3 years ago

A sample of gas has a volume of 20.0 mL at STP. What will the volume be if the temperature is changed to 546 K and the pressure

Ostrovityanka [42]

The volume did not change, it remained at 20 ml

<h3>Further explanation</h3>

Given

20 ml a sample gas at STP(273 K, 1 atm)

T₂=546 K

P₂=2 atm

Required

The volume

Solution

Combined gas Law :

$\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}$

Input the value :

$\tt \dfrac{1\times 20}{273}=\dfrac{2\times V_2}{546}\\\\V_2=\dfrac{1\times 20\times 546}{273\times 2}\\\\V_2=20~ml$

The volume does not change because the pressure and temperature are increased by the same ratio as the initial conditions (to 2x)

5 0

2 years ago